Split str* and mem* into string.[ch]

armsrc/string.c

@@ -0,0 +1,62 @@
+/* Implementations of the common string.h functions */
+#include "string.h"
+#include <stdint.h>
+
+void *memcpy(void *dest, const void *src, int len)
+{
+	uint8_t *d = dest;
+	const uint8_t *s = src;
+	while((len--) > 0) {
+		*d = *s;
+		d++;
+		s++;
+	}
+	return dest;
+}
+
+void *memset(void *dest, int c, int len)
+{
+	uint8_t *d = dest;
+	while((len--) > 0) {
+		*d = c;
+		d++;
+	}
+	return dest;
+}
+
+int memcmp(const void *av, const void *bv, int len)
+{
+	const uint8_t *a = av;
+	const uint8_t *b = bv;
+
+	while((len--) > 0) {
+		if(*a != *b) {
+			return *a - *b;
+		}
+		a++;
+		b++;
+	}
+	return 0;
+}
+
+int strlen(const char *str)
+{
+	int l = 0;
+	while(*str) {
+		l++;
+		str++;
+	}
+	return l;
+}
+
+char* strncat(char *dest, const char *src, unsigned int n)
+{
+	unsigned int dest_len = strlen(dest);
+	unsigned int i;
+
+	for (i = 0 ; i < n && src[i] != '\0' ; i++)
+		dest[dest_len + i] = src[i];
+	dest[dest_len + i] = '\0';
+
+	return dest;
+}